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Dental Assistant Practice Exam- Dental Radiography Exam Questions & Answers
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Dental Assistant Practice Exam- Dental Radiography Exam Questions & Answers
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Dental Assistant Practice Exam-Dental Radiography Exam Questions
& Answers
What type of film allows the entire dentition to be viewed on a single film? -
-Panoramic
- Which of the following is not a main component of panoramic x-ray unit? -
-Panoramic film
- What type of device does digital radiography use to record images taken of
the patient's teeth? - -Electronic sensor
- Which of the following inflicts the most radiation on a patient? - -FMX
- What step helps large radiolucent the palate as seen on panoramic x-rays?
- -Having the patient place their tongue in the roof of their mouth
- Why does digital radiography require less radiation than traditional x-rays?
- -Sensors are more sensitive
- Digital x-ray sensors: - -Intraoral are waterproofed by the manufacturer,
but because they cannot be sterilized they must have a disposable barrier
placed on them prior to use with each patient.
- What technique is the preferred exposure method for digital sensors? - -
Paralleling
- Which of the following is not an advantage in regards to digital x-ray
sensors? - -Sensor size
- Which of the following is NOT part of a film packet? - -Inner wrap
- What makes it possible to produce duplicate sets of radiographs without
additional radiation or the need to use a duplicating machine? - -Using
double film packets
- What size film is usually used for occlusal radiographs? - -4
- What size film is appropriate for use as a PA on an upper incisor? - -1
- What use is a size 2 film most appropriate for? - -Posterior PAs and Adult
BWX
, - Which of the following is one of the basic techniques for obtaining x-rays? -
-Paralleling
- What technique places film in line with the long axis of the teeth to be
radiographed? - -Paralleling
- When using the paralleling technique, in what direction is the x-ray beam
aimed? - -90 degrees
- Which of the following requires the use of a film-holding instrument? - -
Paralleling technique
- When placing a film in a PID, which of the following is correct? - -The
raised dot should face the PID and toward the occlusal surface
- What is the position on the patient's face where the central x-ray beam is
aimed? - -Point of entry
- What angulation must be perpendicular to the film and long axis of the
teeth using the paralleling technique? - -Vertical
- Failing to have the x-ray beam in a perpendicular position in a paralleling
technique will result in: - -Foreshortening and Elongation
- What will cause overlapping of proximal contacts? - -Improper horizontal
angulation
- In bisecting the angle, which of the following is NOT true? - -The film is
placed at 30 degrees from the long axis of the tooth and the angle between
is bisected
- What occurs when the x-ray beam is not centered with the xray film? - -
Cone cutting
- FMX series consist of: - -18-20 films including both PA and BWX films
- Premolar BWX should include: - -The distal half of the cuspid crown
- Molar BWX film should be placed: - -Centered over the 2n molars
- What improper placement can cause misdiagnosis on BWX x-rays? - -
Incorrect horizontal angulation
- Where is the film placed when occlusal films are taken? - -Directly against
the occlusal surfaces
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